Pump jack



March 16, 1948. l N. VVQFRANZKOWIAKI 2,437,911

rum JACK Filed July 23, 1945 IIRV' /5 2 ATT RNE Y Patented Mar. 16, W43

STATES PATENT OFFICE My invention relates to pump jacks.

An object of my invention is to provide an arrangement which can be attached at the top of pumps for reciprocating the pump rod.

A further object of my invention is to provide a readily attachable arrangement for this purpose, and which provides a certain levered operation in which a minimum horsepower is required in using the arrangement,

A further object of my invention is to provide 1 an adjustable arrangement for varying the power stroke as desired, and to provide reciprocation in a straight line.

A further object of my invention is to provide a certain arrangement of supports in combination with the device to provide additional leverage and a bearing rest.

A further object of my invention is to provide an arrangement which is easily assembled and of simple manufacture.

With these and other objects in view, my invention consists in the construction, arrangement, and combination of the various parts of my device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which:

Figure 1 is a side elevation of the arrangement as used with the pump, and

Figure 2 is an enlarged detail taken along the lines of 22 of Figure 1.

I have used the character it to designate a standard pump having the spout i l, and an upper bearing plate I? together with the vertically reciprocating pump rod it. My invention comprises the bearing plate it which issecured to the plate 22 by means of the head screws 15 and attached to the plate it are the two vertical cylindrical rods l6 which terminate at I! in the plate l8 which is secured thereto by means of the nuts l9. Slidably engaged with the vertical rods [3 are the four bearings 28 which merge integrally as a cast unit with the horizontal ribs H which ribs extend into the vertical rib 22. Pivotally attached to the ear 23 which is attached to the plate it is a bar 24 which is pivoted and secured at to tile substantially horizontal lever 25 which lever 2% is pivoted at 2'l to the bolt 23 which passes through the pump rod 53 (see Fig. 2) and also passes through the vertical rib 22. Pivotally attached at 2% through any one of the openings 30 at the end of the lever 26 is the substantially vertical lever 3i which is pivoted at 32 eccentrically on the wheel 33 which is driven by means of the shaft 34. The wheel 33 is driven within the casing, 35 by a suitable geared arrangement which is driven from the pulley 36 which pulley 35 is driven by means of the belt 31 passing over a further pulley 38 which is driven by means of the electric motor 39.

The powering arrangement comprising the motor 39, the gears in the casing 35, etc., can be modified to any type, the essential parts of my invention residing in the structure attached to the pump. It will be noted from the foregoing description that the arrangement operates in the following manner. During rotation of the wheel 33 the rod 3| will be reciprocated vertically and dueto the attachment of the lever 26 withthe frame 21, 22 and the pump rod [3, the pump rod l3 will also be raised and lowered with the bearings 23' sliding upwardly and downwardly along the rods 55. The member 24, with its pivotal attachment at 25, provides a fulcrum for the rod 23 thereby requiring less power for the stroke, which also thereby involves a smaller motor 39. The attachment of the rod 3| to the lever 26 can be made at any of the openings 36 to provide an adjustment for power requirements as well as stroke requirements, and it will be noted as shown in Figur 1 that the power is substantially only one-half of that required for a full length lever since the point of pivoting on the pump rod I3 is about halfway. The arm 24 besides providing a fulcrum eifect also provides a contant steadying effect during the stroke since at the upper portions of the stroke, the member 24 will travel toward the center of the pump acting as a stabilizing influence at the maximum points. The bearing structure comprising the bearings 20, etc, maintains accurate alignment of the pump rod centrically at all times during its stroke. For repair or adjustment the plate It can be removed so that the other parts can also be removed or replaced.

It will now be seen that I have provided the various advantages set forth in the objects of my invention with other advantages being readily apparent.

Some changes maybe made in the construction and arrangement of the parts of my invention without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims any modified forms of structure or use of mechanical equivalents which may be reasonably included within their scope.

I claim as my invention:

1. A pump jack mechanism comprising a lever pivotally attached to the pump rod, said lever having an extending portion, a fulcrum member pivotally attached at the extremity of said extending portion, a driving rod pivotally attached at the other end of said lever, means for driving said driving rod, a framework attached adjacent to said pump rod including a pair of vertical posts attached to the pump, a bearing member slidably engaged with said posts and pivotally attached to said lever.

2. A pump jack mechanism comprising a lever pivotally attached to the pump rod, said lever having an extending portion, a fulcrum member pivotally attached at the extremity of said extending portion, a driving rod pivotally attached at the other end of said lever, means for driving said driving rod, a framework attached adjacent to said pump rod including a pair of vertical posts attached to the pump, a bearing member slidably engaged with said posts and pivotally attached to said lever, said posts being parallel to the pump rod, said bearing member including two pairs of spaced sliding bearings each pair of which receives one of said posts.

3. A pump jack mechanism comprising a lever pivotally attached to the pump rod, said lever having an extending portion, a fulcrum member pivotally attached at the extremity of said extending portion, a driving rod pivotally attached at the other end of said lever, means for drivin said driving rod, a framework attached adjacent to said pump rod including a pair of vertical posts attached to the pump, a bearing member slidably engaged with said posts and pivotally attached to said lever, said posts being parallel to the pump rod, said bearing member including two pairs of spaced. sliding bearings each pair of which receives one of said posts, means for varying the stroke and power of said lever including a plurality of openings at the end thereof to provide selective attachment of said driving rod therewith.

4. A pump jack mechanism comprising a lever pivotally attached to the pump rod, said lever having an extending portion, a fulcrum member pivotally attached at the extremity of said extending portion, a driving rod pivotally attached at the other end of said lever, means for driving said driving rod, a framework attached adjacent to said pump rod including a pair of vertical posts attached to the pump, a bearing member slidably engaged with said posts and pivotally attached to said lever, said posts being parallel to the pump rod, said bearing member including two pairs of spaced sliding bearings each pair of which receives one of said posts, means for varying the stroke and power of said lever including a plurality of openings at the end thereof to provide selective attachment of said driving rod therewith, a base plate to which said vertical posts are attached, the lower end of said fulcrum member being pivotally attached to said base plate, the pivotal attachment of said pump rod, lever, and bearing member being between the upper fulcrum member end and the pivotal attachment of said driving rod and said lever, said lever being normally horizontal.

NICHOLAS W. FRANZKOWIAK.

REFERENCES CITED UNITED STATES PATENTS Name Date Harris Feb. 15, 1938 Number 

